From 7c021fd14af3a4558bab8cb256abac77ac6148de Mon Sep 17 00:00:00 2001
From: Viktor Szakats <commit@vsz.me>
Date: Wed, 8 Oct 2025 21:40:07 +0200
Subject: [PATCH] cmake: minor Heimdal flavour detection fix

Do not detect Heimdal if a single `H` character appears in the vendor
string, require the full name: `Heimdal`.

Cherry-picked from #18932
Closes #18951
---
 CMake/FindGSS.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMake/FindGSS.cmake b/CMake/FindGSS.cmake
index aa640c3342..398e38aa98 100644
--- a/CMake/FindGSS.cmake
+++ b/CMake/FindGSS.cmake
@@ -164,7 +164,7 @@ if(NOT _gss_FOUND)  # Not found by pkg-config. Let us take more traditional appr
     if(_gss_configure_failed)
       set(GSS_FLAVOUR "Heimdal")  # most probably, should not really matter
     else()
-      if(_gss_vendor MATCHES "H|heimdal")
+      if(_gss_vendor MATCHES "Heimdal|heimdal")
         set(GSS_FLAVOUR "Heimdal")
       else()
         set(GSS_FLAVOUR "MIT")